/*
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.hologres.hive.output;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
import org.apache.hadoop.hive.ql.io.HiveOutputFormat;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.io.MapWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputFormat;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.util.Progressable;

import java.io.IOException;
import java.util.Properties;

/** HoloOutputFormat. */
public class HoloOutputFormat
        implements OutputFormat<NullWritable, MapWritable>,
                HiveOutputFormat<NullWritable, MapWritable> {

    @Override
    public FileSinkOperator.RecordWriter getHiveRecordWriter(
            JobConf jobConf,
            Path path,
            Class<? extends Writable> aClass,
            boolean b,
            Properties properties,
            Progressable progressable)
            throws IOException {
        TaskAttemptContext taskAttemptContext =
                ShimLoader.getHadoopShims().newTaskAttemptContext(jobConf, null);
        return new HoloRecordWriter(taskAttemptContext);
    }

    @Override
    public RecordWriter<NullWritable, MapWritable> getRecordWriter(
            FileSystem fileSystem, JobConf jobConf, String s, Progressable progressable)
            throws IOException {
        throw new UnsupportedOperationException("Write operations are not allowed.");
    }

    @Override
    public void checkOutputSpecs(FileSystem fileSystem, JobConf jobConf) throws IOException {}
}
